AMPLITUDE MODULATOR USING A VARIABLE PHASE SQUARE WAVE VOLTAGE GENERATOR

摘要

A method and apparatus for impressing an auto or information signal upon a carrier utilizes an arcsine generator to cause the envelope of the carrier to follow the input signal. The invention stems from the realization that if rectangular pulses of bipolar amplitude are symmetrically centered about 0 and .pi. radians, the harmonic content can be expressed as a function of the angle of the rectangular pulses. A circuit employing conventional logic elements is used to realized this concept.